Display screen with a graphical user interface



FIG. 1 is a front view showing an embodiment of our new and ornamental design of a display screen with a graphical user interface;

FIG. 2 is a front view of a second embodiment thereof; and,

FIG. 3 is a front view of another embodiment thereof.

The outer broken line rectangle shows the display screen and forms no part of the claim. The other broken lines show portions of the graphical user interface which form no part of the claim. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 